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38 lines
982 B
38 lines
982 B
3 years ago
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2017-05-30 Jakub Jelinek <jakub@redhat.com>
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Backported from mainline
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2016-09-16 Jakub Jelinek <jakub@redhat.com>
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PR c++/77375
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* class.c (check_bases): Set CLASSTYPE_HAS_MUTABLE if any
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TYPE_HAS_MUTABLE_P for any bases.
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* g++.dg/cpp0x/mutable1.C: New test.
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--- gcc/cp/class.c 2017-10-17 17:27:32.287980595 +0200
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+++ gcc/cp/class.c 2017-10-17 17:29:11.104213281 +0200
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@@ -1479,6 +1479,8 @@ check_bases (tree t,
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|= CLASSTYPE_CONTAINS_EMPTY_CLASS_P (basetype);
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TYPE_HAS_COMPLEX_DFLT (t) |= (!TYPE_HAS_DEFAULT_CONSTRUCTOR (basetype)
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|| TYPE_HAS_COMPLEX_DFLT (basetype));
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+ if (TYPE_HAS_MUTABLE_P (basetype))
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+ CLASSTYPE_HAS_MUTABLE (t) = 1;
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/* A standard-layout class is a class that:
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...
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--- /dev/null
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+++ gcc/testsuite/g++.dg/cpp0x/mutable1.C
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@@ -0,0 +1,12 @@
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+// PR c++/77375
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+// { dg-do run { target c++11 } }
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+
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+struct Base { mutable int i; };
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+struct Derived : Base {};
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+const Derived foo{};
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+
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+int
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+main ()
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+{
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+ foo.i = 42;
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+}
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